BMW K bikes (Bricks)

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1Back to top Go down   Electrikary Empty Electrikary on Sat Oct 26, 2019 11:07 am

Stumpy

Stumpy
Silver member
Silver member
I have been riding my k and enjoying every minute. On my last ride the bike ran well until I was returning home, at 50mph and above 3000 rpm,  the bike started to misfire and stalled, when running at normal traffic speed of 20/30 mph the bike ran fine. I did have my lights on, and when I got back to the garage, I put the battery back on charge.


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BMW K100RT 0095857
    

2Back to top Go down   Electrikary Empty Re: Electrikary on Sat Oct 26, 2019 11:18 am

brickrider2

brickrider2
Life time member
Life time member
Is the fuel filter clogged and passing insufficient fuel? 
You seem to have determined the source of the poor running is electrical, but why?  Have you had this problem in the past?  
Which model are you riding?   Exclamation


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1996 K1100LT
    

3Back to top Go down   Electrikary Empty Re: Electrikary on Sat Oct 26, 2019 11:59 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
What is the condition of the four pin tank connector?  They are known to cause problems when running from the vibrations and dirty/loose pins.


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Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

4Back to top Go down   Electrikary Empty Re: Electrikary on Sat Oct 26, 2019 1:51 pm

Stumpy

Stumpy
Silver member
Silver member
@Point-Seven-five wrote:What is the condition of the four pin tank connector?  They are known to cause problems when running from the vibrations and dirty/loose pins.
The connection is good, I keep it clean and tight fitting.


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BMW K100RT 0095857
    

5Back to top Go down   Electrikary Empty Re: Electrikary on Sat Oct 26, 2019 1:54 pm

Stumpy

Stumpy
Silver member
Silver member
@brickrider2 wrote:Is the fuel filter clogged and passing insufficient fuel? 
You seem to have determined the source of the poor running is electrical, but why?  Have you had this problem in the past?  
Which model are you riding?   Exclamation
The fuel system has been replaced, new mounts and fuel pump and new filters. My bike is a 1988 K100RT. The problem has been there since I got the bike, recently it has got worse.


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BMW K100RT 0095857
    

6Back to top Go down   Electrikary Empty Re: Electrikary on Sat Oct 26, 2019 4:37 pm

volador

volador
Gold member
Gold member
Starter motor cleaning? Ignition switch cleaning? Temp sensor condition?


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1984 K100RS  1991 K100RS  Reap The Wild Wind... Ever Commute Is An Adventure
    

7Back to top Go down   Electrikary Empty Re: Electrikary on Sat Oct 26, 2019 5:12 pm

Laitch

Laitch
Life time member
Life time member
@Stumpy wrote:The problem has been there since I got the bike, recently it has got worse.
Have you checked the condition and attachment of the z-hose breather that runs from the crankcase to the air box on the left side of the engine. Have you checked the rubber intake manifolds on the throttle bodies for leaks using carb cleaner or propane while the engine is running? An engine with air leaks might perform acceptably at low revs but lean-out and stumble under load.


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1995 K75 73,000 miles
Electrikary Usa-lo10
    

8Back to top Go down   Electrikary Empty Re: Electrikary on Sat Oct 26, 2019 8:33 pm

RicK G

RicK G
VIP
VIP
Fuel filter is the first thing I would check and if you don't know when it was last replaced then replace it.


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"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

9Back to top Go down   Electrikary Empty Re: Electrikary on Sat Oct 26, 2019 9:11 pm

Stumpy

Stumpy
Silver member
Silver member
No one has got close, it is the regulator/ rectifier, the brushes are knackered. 
At low revs the voltage was 13.7 at high revs the voltage was 12.9. I have just put the new one on the bike,I have not yet been out to check it but with everything else that I have replaced and repaired, I am confident that this was the problem.Electrikary 41097210


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BMW K100RT 0095857
    

10Back to top Go down   Electrikary Empty Re: Electrikary on Sat Oct 26, 2019 11:22 pm

volador

volador
Gold member
Gold member
Twas my next reply. Approx. how many thousand miles on that VR?


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1984 K100RS  1991 K100RS  Reap The Wild Wind... Ever Commute Is An Adventure
    

11Back to top Go down   Electrikary Empty Re: Electrikary on Sun Oct 27, 2019 5:42 am

Stumpy

Stumpy
Silver member
Silver member
@volador wrote:Twas my next reply. Approx. how many thousand miles on that VR?
My bike has 50410 miles, they look like the original set. I am going to clean the housing and replace the brushes for future use.


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BMW K100RT 0095857
    

12Back to top Go down   Electrikary Empty Re: Electrikary on Sun Oct 27, 2019 10:44 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I'm a firm believer that the voltage regulator can be the source of running problems and shouldn't be overlooked when all else fails.  I had a 16 valve K100 that would die when coming down to idle from a high speed run.  After over a year of checking everything in the engine controls the problem was solved when the voltage regulator was replaced.

The engine controls rely on adequate electrical power.  When all else fails to correct a driveability issue, replace the voltage regulator.  Fortunately, they are not terribly expensive or difficult to replace.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

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